Duke Kang of Qi (Chinese: 齊康公; pinyin: Qí Kāng Gōng), personal name Lü Dai, was duke of the Qi state from 404 BC to 386 BC.
Duke Kang succeeded his father, Duke Xuan of Qi, who died in 405 BC after 51 years of reign as titular ruler of Qi.
Since Tian Heng killed Duke Xuan's uncle Duke Jian of Qi in 481 BC, the leaders of the Tian clan had been the de facto rulers of Qi.
With the lobbying of Marquis Wu of Wei, in 386 BC King An of Zhou, the nominal ruler of all China, officially recognized Tian He as ruler of Qi, ending more than six centuries of rule by the House of Jiang.
[4] After Tian He ascended the throne of Qi, he exiled Duke Kang to Zhifu Island in present-day Shandong Province, where he lived for seven more years and died in 379 BC.